Thread: Trig question

If an earthquake has an intensity of x, then its magnitude, as compounded by the Richter Scale, is given by R(x) = log x/I sub 0, where I sub 0 is the intensity of a small measurable earthquake. (consider I sub 0 = 1 for this problem). If one earthquake has a magnitude of 4.4 on the richter scale and a second earthquake has the magnitude of 5.8 on the Richter scale, howe many times more intense (to the nearest whole number) is the second earthquake than the first?


A) 6
B) 15,848,931,925
C) 25
D) 21

Originally Posted by cspan1986

If an earthquake has an intensity of x, then its magnitude, as compounded by the Richter Scale, is given by R(x) = log x/I sub 0, where I sub 0 is the intensity of a small measurable earthquake. (consider I sub 0 = 1 for this problem). If one earthquake has a magnitude of 4.4 on the richter scale and a second earthquake has the magnitude of 5.8 on the Richter scale, howe many times more intense (to the nearest whole number) is the second earthquake than the first?


A) 6
B) 15,848,931,925
C) 25
D) 21

There is no need to put font tags around all options - it just makes it harder to read. Also this is a log problem - trig isn't involved






Take the ratio of these



and are known and is the ratio of intensity (the answer you want)